Updating a Table through Workbench

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I have a SQL table that gets constantly updated. Meaning, the old entries in the table get updated all the time. I connected this table through DOMO workbench and chose that the update method should be 'Append' instead of 'Replace'. However, it just adds new entries instead of updating existing data. Is there any way to update such a table to have new entries brought in and update existing entries without replacing the entire table? It's a very large table and I do not want to update the entire table daily.

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